Water intake fish diversion apparatus

Details Water intake fish diversion apparatus Water intake fish diversion apparatus

1992-06-22

1995-01-31

Taylor, Dennis L.

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

405127, E02B 808

Patent

active

053854284

ABSTRACT:
A fish diversion apparatus uses a plane screen to divert fish for variety of types of water intakes in order to protect fish from injury and death. The apparatus permits selection of a relatively small screen angle, for example ten degrees, to minimize fish injury. The apparatus permits selection of a high water velocity, for example ten feet per second, to maximize power generation efficiency. The apparatus is especially suitable retrofit to existing water intakes. The apparatus is modular to allow use plural modules in parallel to adjust for water flow conditions. The apparatus has a floor, two opposite side walls, and a roof which define a water flow passage and a plane screen within the passage. The screen is oriented to divert fish into a fish bypass which carries fish to a safe discharge location. The dimensions of the floor, walls, and roof are selected to define the dimensions of the passage and to permit selection of the screen angle. The floor is bi-level with a level upstream of the screen and a level beneath screen selected to provide a uniform flow distribution through the screen. The apparatus may include separation walls to provide a water flow channel between the apparatus and the water intake. Lead walls may be used to adjust water flow conditions into the apparatus. The apparatus features stoplog guides near its upstream and downstream ends to permit the water flow passage to be dewatered.

REFERENCES:
patent: 1825169 (1931-09-01), Wyckoff
patent: 2168341 (1939-08-01), Holmes et al.
patent: 4481904 (1985-07-01), Fletcher
patent: 4526494 (1984-07-01), Eicher
patent: 4740105 (1988-04-01), Wollander

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